Although now Rossini is remembered for his operatic production, his career had begun as a composer of chamber music. In 1804 the 12-year-old Gioachino was invited to spend the summer in the villa of his friend Agostino Triossi in Conventello. This rich landowner, who was an amateur double-bass player, was in the habit of organising concerts and musical gatherings: Rossini composed many instrumental pieces for him. The "Sei sonate a quattro for two violins, cello and double-bass" were composed for one of these occasions.

As Rossini himself related, “They are six horrible sonatas, composed by me during a holiday near Ravenna, in the house of my friend and patron Agostino Triossi, at a more than childish age, when I had not even had a single accompaniment lesson, and the whole thing was composed and copied in three days and performed dreadfully by Triossi, double-bass, Morini (his cousin) first violin, his brother, cello, and the second violin was me, who, to own the truth, was the least dreadful.”

We must not be misled by such a negative opinion. These sonatas, though elementary from a formal point of view, are genuine and quite inspired: the contrast between the brilliant passages and the lyrical/sentimental ones already reveals what a skillful opera composer Rossini was to become.